Diagnostic trouble code (DTC) information

WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.

Condition

Fig 1: Identifying Intake Air Temperature (IAT) Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

Diagnostic trouble code (DTC) ECM-0F is stored if the control module receives a signal from the intake air temperature (IAT) sensor which corresponds to a temperature lower than -48 °C (low signal) or higher than +142 °C (high signal).

Substitute Value

When driving: latest correct values
Adaptation values not updated.

Possible Source

Signal too high:

Short-circuit to supply voltage in the signal cable
Open-circuit in the signal cable or in the ground lead
Faulty intake air temperature (IAT) sensor.

Signal too low:

Short-circuit to ground in the signal cable
Faulty intake air temperature (IAT) sensor.

Fault symptom[s]

Malfunction indicator lamp (MIL) lit
No leak diagnostic.